| A New Method of Reducing Assembly Delay of Speech Packets |
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| 作者姓名： | YANG Zhen |
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| 作者单位： | Nanjing University of Posts and Telecommunications，Nanjing 210003，P.R. China |
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| 基金项目： | SupportedbytheFoundationofMPTofChina. |
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| 摘 要： | 1 ＩｎｔｒｏｄｕｃｔｉｏｎＴｈｅｏｕｔｐｕｔｏｆｓｐｅｅｃｈｃｏｄｅｒｓｗｉｌｌｂｅｐｒｏｃｅｓｓｅｄｄｉｆｆｅｒｅｎｔｌｙｗｈｅｎｔｒａｎｓｍｉｔｔｅｄｉｎＩＰａｎｄＡＴＭｎｅｔ ｗｏｒｋｓ,ｃｏｍｐａｒｅｄｗｉｔｈｔｈｅｃａｓｅｉｎＰＳＴＮｎｅｔｗｏｒｋｓ.ＩｆｔｈｅｃｏｄｅｓｔｒｅａｍｓｆｒｏｍｓｏｍｅｓｐｅｅｃｈｅｎｃｏｄｅｒａｒｅｔｒａｎｓｍｉｔｔｅｄｉｎＩＰｎｅｔｗｏｒｋｓ,ｔｈｅｙｓｈｏｕｌｄｆｉｒｓｔｏｆａｌｌｂｅｐｒｏｃｅｓｓｅｄｂｙｔｈｅｕｐｐｅｒｌａｙｅｒａｎｄｔｒａｎｓｐｏ…
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A New Method of Reducing Assembly Delay of Speech Packets |
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| YANG Zhen.A New Method of Reducing Assembly Delay of Speech Packets[J].The Journal of China Universities of Posts and Telecommunications,2001,8(4). |
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| Authors: | YANG Zhen |
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| Abstract: | Voice over IP ( VoIP ) and Voice over ATM ( VoA ) are two research hotspots in the fields of communication technology. One of the main problems degrading the QoS in VoIP and VoA is the longer time delay when speech packets are transmitted from a speaker to a listener. This paper discusses in detail the composition of time delay and the influence of different parts of delay on speech quality under IP and ATM network environments. The author puts forward a new method to convert usual CBR code streams into VBR streams for the purpose of reducing time delay from one terminal to another, which can avoid the dilemma between compressing the bit rates of speech sources and reducing assembly delay of speech packets. |
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| Keywords: | speech communication CBR and VBR code streams time delay |
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